style: Unbox a bunch of color properties.

This builds on https://github.com/servo/rust-cssparser/pull/118.

components/layout/Cargo.toml

@@ -14,7 +14,7 @@ app_units = "0.3"
 atomic_refcell = "0.1"
 bitflags = "0.7"
 canvas_traits = {path = "../canvas_traits"}
-cssparser = {version = "0.7", features = ["heap_size", "serde-serialization"]}
+cssparser = {version = "0.8", features = ["heap_size", "serde-serialization"]}
 euclid = "0.10.1"
 fnv = "1.0"
 gfx = {path = "../gfx"}

components/layout/display_list_builder.rs

@@ -2188,7 +2188,7 @@ pub trait ToGfxColor {
 
 impl ToGfxColor for RGBA {
     fn to_gfx_color(&self) -> ColorF {
-        ColorF::new(self.red, self.green, self.blue, self.alpha)
+        ColorF::new(self.red_f32(), self.green_f32(), self.blue_f32(), self.alpha_f32())
     }
 }
 

components/layout/table_row.rs

@@ -607,12 +607,7 @@ impl CollapsedBorder {
         CollapsedBorder {
             style: border_top_style::T::none,
             width: Au(0),
-            color: Color::RGBA(RGBA {
-                red: 0.0,
-                green: 0.0,
-                blue: 0.0,
-                alpha: 0.0,
-            }),
+            color: Color::RGBA(RGBA::transparent()),
             provenance: CollapsedBorderProvenance::FromTable,
         }
     }